109289 has 4 divisors (see below), whose sum is σ = 109956. Its totient is φ = 108624.

The previous prime is 109279. The next prime is 109297. The reversal of 109289 is 982901.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 982901 = 97 ⋅10133.

It can be written as a sum of positive squares in 2 ways, for example, as 85264 + 24025 = 292^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 109289 - 2¹⁶ = 43753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (109229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107 + ... + 479.

It is an arithmetic number, because the mean of its divisors is an integer number (27489).

2¹⁰⁹²⁸⁹ is an apocalyptic number.

It is an amenable number.

109289 is a deficient number, since it is larger than the sum of its proper divisors (667).

109289 is an equidigital number, since it uses as much as digits as its factorization.

109289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 109289 is about 330.5888685361. The cubic root of 109289 is about 47.8107420289.

The spelling of 109289 in words is "one hundred nine thousand, two hundred eighty-nine".